Valve for regulating gas flames



Nov. 20, 1928.

G. SCHLUSSELBURG VALVE FOR REGULATING GAS lFLAMES I original Filed June8, 19@

Patented Nov.V 20, 1928.

UNITED STATES GEORGE sCHLUssELBUnG, or CHICAGO, ILLINOIS, AssIGNon/ ToHALE, OL' LONDON, ENGLAND.

PATENT OFFICE. g

VALVE FOR, BEGULAT'ING GAS FLAMES.

Application nied June 8, 1926, Serial No. 114,431, and in Great Britain.Tune 8, 1925. Renewed August 17,

The present invention relates to safety valves or cocks for regulatinggas ames of the type which, in addition to the main valve or cock,provides supplemental lmeans for the passing of a small amount of gasrequired 1n lighting the burner. In devices of this kind, it some timeshappens that the ame 1s accidentally extinguished. by drafts or by theboiling over ofliquid, and 1n the absence of means for automaticallyshutting OE the valve, the gas will continue to escape.

The present invention is directed to an automatically controlledsupplemental cock which is so arranged-that it may be momentarilyvturned by hand toopenposition for lightin the flame and thereafterreleased and restored to its normal closed position, the gas supply beinthereupon maintained by the actionof a iaphragm and associated meanswhich serve to unseat the plug of the supplemental cock therebyaffording an open passageway for the gas supply so long as the flameremains lighted, but which will automatically close such passageway uponan accidental extinction of the ame and a consequent cooling of theregulator which controls the diaphragm.

The invention also is directed toa co-ordination of the automaticcontrolling means with-the main valve plugin such a way as to permitboth the main and supplemental valves to be rotatedby a single handwheel,

' either separately or in unison as required in the proper functioningof the. device. v

Further objects and details will appear from the description of theinvention in connection with the accompanying drawings whereinv Figure 1is a plan view of the burner and safety cock, the operating disk of thelatter being removed; and

Fig. 2 is a side view showing the cock in longitudinal section.

The cock consists essentially of a main plug 1 of the usual taperedformation provided with a cross bore l and adapted to be turned ,forordinary regulating purposes by the rotation of a disk 2 which in turnis rotated by engagement with a superposed disk 3, a section of the rimof which is cut away, as shown in Fig. 1, to afford shoulders orabutments 4 and 5 respectively, either one of which is adapted tokengage with a projecting lug 6 0n the disk 2. This arrangementyasshown,

affords a free movement of about 90 the disk 3 between the shoulders-4and 5.

The disk 3 is mounted upon and turns with FRANCIS EDWARD The spindle 7carries at its upper end an'` y operating disk shaped fiangedcap 8 whichconstitutes a hand wheel ,for the rotation of both th main plug land thesupplemental plug 9, which lattery is located and seated Within the mainplug and is of conical formation and provided with a cross bore 9awhich, as shown in Fig. 2, will normally maintain a position transverseto the bore through the main plug. The supplemental plug 9 is maintainedin its seate position by a spring 10, and is provided with two pins 11which enga e with corresponding recesses 11a in the spin le.

' The spindle is encircled by a coil spring 12, the inner convolution ofwhich is secured to the spindle. and the outer convolution of whichbears against the lug 6 on the disk 2, the arrangement being such thatwhen the hand wheel 8 is rotated in a clockwise direction through aquarter of a revolution, the

s ring will be tensioned. This limited rotation of the hand wheel servesto turn the sup plemental plug sufficiently to bring its cross bore 9ainto registry with the bore through the main plug which admits a smallamount of gas to the burner 13 suicient to light the same. Adjacent tothe burner 13 is a regulator 14 in the form of a tubular loop providedwith a tubular stem 14a in communication with a chamber 15 formed on theinterio-rof a corrugated diaphragm 16 which carries a stem 17 extendingaxially through the lower end of the main plug and bea-ring against thelower end of the supplemental plug. When the gas is ignited it serves toheat the air trapped in the regulator 14:, the expansion of whichcauses'the diaphragm to lift the pin 17 which in turn lifts thetapered'supplemental plug from its seat within the mamplug, therebyestablishing open communication in the gas line' around the base' of thesup lemental plug which serves to provide a. suliicient flow of gas tomaintain the flame from the burner.

When the supplemental plug has been given a preliminary turning movementto bring its cross bore 9 into. register with the gas passage, theburner may be lighted, and if the hold on the hand wheel is maintainedfor a short period of time, the trapped air in the regulator will causea swelling of the diaphragm 16 which will lift the pin 17 and with itthe supplemental plug, so that the latter Y will be unseated and thuspermit a continued cient to heat the regulator 14;, the supplementalplug will be held unseated. If, however,

. the llame should be accidentally extinguished,

the cooling of the trapped air in the regulator will cause a collapse ofthe diaphragm with a consequent dropping of the pin 17, which permitsthe supplemental plug to reseat itself under spring pressure and thuscut off the last remaining supply of gas.

The stem of the regulator terminates in a threaded tube 18 which passesthrough an internally threaded bushing 19 fitted with a lock nut 2Owhich bears against the base of the diaphragm casing 21, whicharrangemenirpermits the diaphragm with its pin 17 to be verticallyadjusted within the casing to the degree necessary to properly bearagainst the lower end of the supplemental plug.

The main plug can be turned by continued rotation of the hand wheelafter the free motion has been'taken up and the shoulder 4; on the disk3 has been brought into engagement with the lug or projection 6 which,of course, permits the flow of gas through the main line to be regulatedor completely cut off as may be desired, but such turning adjustment ofthe main plug will in no way effect the functioning of the automatic cutof' devices which more particularly constitutes the subject matter ofthe present invention.

The device as a whole is one which is self contained and which cannot beaccidentally misadjusted, and the provision of the automatic mechanismof the present invention in n-o way interferes with the easy andconvenient operation of the main lplug which continues to subserve itsfunction in regulating or controlling the size of the llame at theburner. t

I claim:

l. In a device of the class described in combination vwith a burner andgas passage, a main plug for regulating the flow of gas through the gaspassage, a supplemental plug provided with a cross bore and rotatablymounted and normally seated within the main plug and extending acrossthe gas passage for regulating the flow of gas for lightlng purposes,means associated with both mam and supplemental plugs for impartingrotation to the supplemental plug by guished, and means for regulatingthe extent i of the lifting movement impartedto the supplemental plug bythe thermostatic means, substantially as described.

2. In a device of the class described in combination with a burner andgas passage, a main plug for regulating the flow of gas through the gaspassage, a. supplemental plu g provided with a cross bore and rotatablymounted and normally seated within the main plug and extending acrossthe gas passage for regulating the How of gas for lightin purposes,means associated with both mam and supplemental plugs for impartingrotation to the supplemental plug by a limited degree of movement androtation to the main plug by continued movement, and thermostatic meansassociated with the burner when the ame is maintained for lifting thesupplemental plug froml vits seat in the mainplug to maintain the flowof gas, and means operable'to effect reseating of the supplemental 'plugwhen the flame is ,extinguished` said thermostatic means comprising atubular member having ,one of its ends located in proximity to theburner and communicating at its other end with a. diaphragm providedwith a pin positioned to impart an axial thrust to the supplementalplug, substantially as described.

3. In a device of the class described in combination with a burner andgas passage, a main plug located transversely of the gas assage andprovided with a bore adaptel to register therewith, a supplemental pluglocated and normally seated within the main plug and extendingtransversely of the gas passage provided through, the bore of the mainplug, said supplemental plug having a bore normally extendingtransversely to the bore in the main plug, a. spring for holding thesupplemental plug normally in seated relation to the main plug, athermostatic member in the form of a tu e having one end in proximity tothe burner-and communieating with the interior of a diaphragm at itsother end, an extension carried by the diaphragm and positioned toimpart an axial thrust against the supplemental plug to unseat the sameand open the gas passage around the end thereof, and means for rotatingeach of said plugs, said means com prising a hand wheel adapted wheninitially turned to rotate the supplemental plu to bring its bore intoregistry with the bore of the main plug and adapted by continuedrotation to rotate the main plug, substantially as described.

4. In a device of the class described, in combination with a gas passageand burner, a main plug for controlling such passage, a rotatablesupplemental plug adapted When in normal position to control the flow ofgas through the gas passage, means for turning the supplemental plug toopen position to admit the lloW of gas for lighting purposes, andthermostatically controlled means associated with the burner forshifting the supplemental plug from normal position to prevent thesupplemental plug from closing the gas passage while the burner islighted irrespective of the rotative adjustment of' the supplementalplug With respect to the gas passage and means for effecting therestoration of the supplemental plug to its normal position uponextinction of' the flame, substantially as described.

5. In a device of the class described, in combination With a gas passageand burner, a main plug for shifting such passa-ge, a rotatablesupplemental plug located Within the main plug and adapted when innormal position to control the flow of gas through the gas passage,means for turning the supplemental plug to open position to admit theflow of' gas for lighting purposes, and thermostatically controlledmeans associated with the burner for shifting the vsupplemental plugfrom normal position to prevent the supplemental plug from closing thegas passage While the burner is lighted irrespective of the rotativeadjustment of the supplemental plug With respect to the gas passage andmeans for effecting the restoration of the supplemental plug to itsnormal position upon extinction oi the flame, substantially asdescribed.

6. In a device of the class described, in combination with a gas passageand burner, a' main plug extending transversely of the gas passage, asupplemental plug extending transversely of the gas passage andadjustable both rotatively and. transversely of' the gas passage, meansfor rotating the supplemental plug to regulate the admission ol gas forlighting purposes, and a thermostatic member associated with the burnerand adapted when heated by the flame to impart to the supplemental plugan opening movement transversely ot the gas passage irrespective of therotative adjustment of the supplemental plug and means adapted When theflame is extinguished to effect restoration ot the supplemental plug toclosing transverse relation to the gas passage, substantially asdescribed.

7. Ina device of the class described, in combination withagas passageand burner,amain 'lo 'i heated by the flame to impart to thesupplemental plug an opening movement transversely of the gas passageirrespective of the rotative adjustment of the supplemental plug andmeans adapted when the flame is extinguished to effect restoration ofthe supplemental plug to closing transverse relation to the gas passage,substantially as described. 8. In a device of the class described, incombination With a gas passage and burner, a main plug extending-transversely of the gas passage, a supplemental plug extendingtransversely of the gas passage and adjustable both rotatively andtransversely of the gas passage, means for rotating the supplementalplug to regulate the admission of gas j for lighting purposes, athermostatic member associated With the burner and adapted when heatedby the flame to impart to the supplemental plug an opening movementtransversely of the gas passage irrespective of the rotative adjustmentof the supplemental plug and means adapted when the flame isextinguished to efl'ect restoration of the supplemental plug to closingtransverse relation to the gas passage, and means for regulating theextent of transverse movement imparted by the thermostatic member to thesupplemental plug, substantially as described. 9. In a'device of theclass described, in combination with ,a gas passage'and burner,

a main plug extending transversely ofthel gas passage, 4a supplementalplug located Within the body of the main plug and extending transverselyof the gas passage and adjustable both rotatively and transversely ofthe gas passage, means for rotating the sup- \kplemental plug toregulate the admission of gas for lighting purposes, a thermostaticmember associated With the burner and adapted when heated by the flameto impart to the supplemental plug an opening movement transversely ofthe gas passage irrespective of the rotative adjustment of thesupplemental plug and means adapted When the flame is extinguished toeffect restoration of the supplementall plug to closing transverserelation to the gas passage,.and means for regulating the extent ottransverse movement imparted by the thermostatic member to thesupplemental plug, substantially as described. y

.GEORGE sCHLUssELBURG.

